<template>
    <div>
        <!-- 面包屑导航 -->
            <el-breadcrumb separator-class="el-icon-arrow-right">
                <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
                <el-breadcrumb-item>商品管理</el-breadcrumb-item>
                <el-breadcrumb-item>添加商品</el-breadcrumb-item>
            </el-breadcrumb>

            <el-card>
                <el-alert
                title="添加商品信息"
                type="info"
                show-icon :closable="false">
                </el-alert>
                <!-- STEP步骤条 -->
                <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
                </el-steps>

                <!-- 侧边栏 -->
                <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
                    <el-tabs :tab-position="tabPosition" v-model="activeIndex" :before-leave="beforeTabLeave" @tab-click="tabClicked">
                    <el-tab-pane label="基本信息" name="0">
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price">
                            <el-input v-model="addForm.goods_price" type="number">

                            </el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight" type="number">

                            </el-input>
                        </el-form-item>

                        <el-form-item label="商品数量" prop="goods_number">
                                <el-input v-model="addForm.goods_number" type="number">
                                </el-input>      
                        </el-form-item>

                        <el-form-item label="商品分类" prop="goods_cat">
                            <el-cascader
                            v-model="addForm.goods_cat"
                            :options="cateList"
                            :props="cateProps"
                            @change="handleChange" clearable></el-cascader>    
                        </el-form-item>

                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name="1">
                        <el-form-item v-for="item in manyTableData" :key="item.attr_id" :label="item.attr_name">
                            <el-checkbox-group v-model="item.attr_vals">
                            <el-checkbox v-for="(cb, i) in item.attr_vals" :key="i" :label="cb" border>
                            </el-checkbox>
                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                            <el-input v-model="item.attr_vals"></el-input>

                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                        <el-upload
                        :action="uploadURL"
                        :on-preview="handlePreview"
                        :on-remove="handleRemove"
                        list-type="picture" :headers="headerObj" :on-success="handleSuccess">
                        <el-button size="small" type="primary">点击上传</el-button>
                        </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name="4">
                        <quill-editor v-model="addForm.goods_introduce">

                        </quill-editor>
                        <el-button type="primary" @click="add">添加商品
                        </el-button>
                    </el-tab-pane>
                    </el-tabs>
                </el-form>
            </el-card>

            <!-- 预览对话框 -->
            <el-dialog
            title="预览"
            :visible.sync="previewVisible"
            width="50%">
              <img :src="previewPath" alt="">
            </el-dialog>
    </div>
</template>

<script>
import _ from 'lodash'
export default {
    data() {
        return {
            activeIndex: '0',
            tabPosition: 'left',
            addForm: {
                goods_name: '',
                goods_price: 0,
                goods_weight: 0,
                goods_number: 0,
                goods_cat: [],
                pics: [],
                goods_introduce: '',
                attrs: []
            },
            addFormRules: {
                goods_name: [
                    {required: true, message: '请输入商品名称', trigger: 'blur'}
                ],
                 goods_price: [
                    {required: true, message: '请输入商品价格', trigger: 'blur'}
                ],
                 goods_weight: [
                    {required: true, message: '请输入商品重量', trigger: 'blur'}
                ],
                 goods_number: [
                    {required: true, message: '请输入商品数量', trigger: 'blur'}
                ],
                goods_cat: [
                    {required: true, message: '请选择商品分类', trigger: 'blur'}
                ]
            },
            cateList: [],
            cateProps: { 
                label: 'cat_name',
                value: 'cat_id',
                children: 'children',
                expandTrigger: 'hover',
                checkStrictly: true
            },
            manyTableData: [],
            onlyTableData: [],
            uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
            headerObj: {
                Authorization: window.sessionStorage.getItem('token')
            },
            previewPath: '',
            previewVisible: false
        }
    },
    created() {
        this.getCateList()
    },
    methods: {
        async getCateList() {
           const {data: res} = await this.$http.get('categories')
           if(res.meta.status !== 200) {
               return this.$message.error('获取商品分类数据失败')
           }
           this.cateList = res.data
        },
        handleChange() {
            if(this.addForm.goods_cat.length !== 3) {
                this.addForm.goods_cat = []
            }
        },
        beforeTabLeave(activeName, oldActiveName) {
            if(oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
                this.$message.error('请先选择商品分类!')
                return false
            }
        },
        async tabClicked() {
            if(this.activeIndex === '1') {
               const{data: res} = await this.$http.get(`categories/${this.cateId}/attributes`, {params: {sel: 'many'}})
               if(res.meta.status !== 200) {
                   return this.$message.error('获取失败')
               }
               res.data.forEach(item => {
                   item.attr_vals = item.attr_vals === 0 ? [] : item.attr_vals.split(' ')
               })
                this.manyTableData = res.data
            } else if(this.activeIndex === '2') {
                const{data: res} = await this.$http.get(`categories/${this.cateId}/attributes`, {params: {sel: 'only'}})
               if(res.meta.status !== 200) {
                   return this.$message.error('获取失败')
               }
              /*  res.data.forEach(item => {
                   item.attr_vals = item.attr_vals === 0 ? [] : item.attr_vals.split(' ')
               }) */
                this.onlyTableData = res.data
            }
        },
        handlePreview(file) {
            this.previewPath = file.response.data.url
            this.previewVisible = true
        },
        handleRemove(file) {
            const filePath = file.response.data.tmp_path
           const i = this.addForm.pics.findIndex(x => {
               x.pic === filePath
           })
           this.addForm.pics.splice(i, 1)
        },
        handleSuccess(response) {
            const picInfo = {pic: response.data.tmp_path}
            this.addForm.pics.push(picInfo)
        },
        add() {
            this.$refs.addFormRef.validate(async valid => {
                if(!valid) {
                    return this.$message.error('请填写完整信息')
                }
                const form = _.cloneDeep(this.addForm)
                form.goods_cat = form.goods_cat.join(',')
                this.manyTableData.forEach(item => {
                    const newInfo = {
                        attr_id: item.attr_id,
                        attr_value: item.attr_vals.join(' ')
                    }
                    this.addForm.attrs.push(newInfo)
                })
                this.onlyTableData.forEach(item => {
                    const newInfo = {
                        attr_id: item.attr_id,
                        attr_value: item.attr_vals
                    }
                    this.addForm.attrs.push(newInfo)
                })
                form.attrs = this.addForm.attrs
                const {data: res} = await this.$http.post('goods', form)
                if(res.meta.status !== 201) {
                    return this.$message.error('添加商品失败')
                }
                this.$message.success('添加商品成功')
                this.$router.push('/goods')
            })
        }
    },
    computed: {
        cateId() {
            if(this.addForm.goods_cat.length === 3) {
                return this.addForm.goods_cat[2]
            }
            return null
        }
    }
}
</script>

<style lang="less" scoped>
    .el-alert {
        margin-bottom: 10px
    }
    .el-checkbox {
        margin: 0 10px 0 0 !important
    }
</style>